Hello Dear
1. The inode is a fundamental concept in the Linux and UNIX filesystem. Each object in the filesystem
is represented by an inode.
2. An inode is a data structure on a traditional Unix-style file system such as UFS or ext3. An inode
stores basic information about a regular file, directory, or other file system object.

An inode is a data structure on a filesystem on Linux and other Unix-like operating systems that stores all the information about a file except its name and its actual data. A data structure is a way of storing data so that it can be used efficiently.